La promenade de la roue et des marmites
At the foot of Saint-Germain-de-Joux, the Combet river rushes into one last waterfall before converging with the Semine. During the early 1900s, the Thévenin sawmill decided to upsize to fully benefit from this high flow rate. At the time, it had a “giant” 7.5-meter-high water wheel which would run day and night, to match the rhythm of arrivals and orders. Housed just downstream from the sawmill, the sawyers would work hard around the clock. In 1859, a diamond factory set up in this restricted perimeter - which was highly sought after in the first part of the 19th century due to its hydropower installations - just downstream from the sawmill and the Romain bridge.
The Giant’s kettles
In Saint-Germain-de-Joux, the erosion caused by the Semine and its tributary, the Combet, creates huge holes called potholes or “kettles”. Measuring two to three metres deep, they are linked together by a few successive waterfalls, where the famous brown trout can be found. Keep your eyes peeled, you may also come across the yellow-bellied toad, a rare species of toad.
The yellow-bellied toad
This small toad with a grey, brown or olive-coloured back has a bright yellow underbelly and throat, which serves to warn any nearby predators of its toxicity. Its skin gives off venom that can cause unpleasant burns. If you look closely at the picture, you will notice its heart-shaped eyes! Is your prince charming a yellow-bellied toad?
Après l'avoir découvert, faire un aller-retour jusqu'aux Marmites de Géant.
Après être revenu à la scierie, continuer la route qui remonte au village en suivant le panneau Promenade de la roue et des marmites RETOUR (balisage jaune). Arrivés sur une route fréquentée, la rue de la Gare, il suffit de rejoindre la parking du jeu de quilles en la remontant.
Au long de cette courte sortie, cinq panneaux d'interprétation donnent des explications ce milieu naturel et les aménagment hydrauliques de l'Homme :
- L'ancienne scierie Thévenin
- La conduite forcée
- Les caractéristiques de la Roue
- Les Marmites de Géant
- L'arrivée des Grumes
Access and parking
Le parking du jeu de quille se trouve rue de la Gare, vers l'église.
Report a problem or an error
If you have found an error on this page or if you have noticed any problems during your hike, please report them to us here:
The wheel and kettle hike
From the village of Saint-Germain-de-Joux, this short hike will take you to the gorges dug out by the Semine to discover some interesting geological formations. In this natural environment where man has demonstrated his know-how in using hydropower, the river is still in power and continues its wild passage.